C/6 Quintesence ash glaze

Nepheline syenite 53
Dolomite 13
Ash Berhens 11
Gerstley borate 10
Zinc oxide 3
EPK 5
Silica 5
Total 100
Bentonite 2

Na2O 0.22 Al2O3 0.34 SiO2 1.61
K2O 0.07 B2O3 0.09 P2O5 0.02
MgO 0.19 TiO2 0.00
CaO 0.45 Fe2O3 0.01
ZnO 0.08

Alumina:Silica ratio is 1.00:4.67
Neutral:Acid ratio is 1.00:3.75
Alk:Neut:Acid ratio is 1.00:0.40:1.63

3

Expansion: 89.8 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3